CN103958179A - Film composition for controlled peelable seal film - Google Patents

Film composition for controlled peelable seal film Download PDF

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Publication number
CN103958179A
CN103958179A CN201280058627.1A CN201280058627A CN103958179A CN 103958179 A CN103958179 A CN 103958179A CN 201280058627 A CN201280058627 A CN 201280058627A CN 103958179 A CN103958179 A CN 103958179A
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China
Prior art keywords
lldpe
layer polymer
blend
film
sealant
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CN201280058627.1A
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Chinese (zh)
Inventor
T·赫梅尔-大卫多克
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Becton Dickinson and Co
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Becton Dickinson and Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2274/00—Thermoplastic elastomer material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/738—Thermoformability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

The present invention provides a polymeric film and, and more particularly provides a multi-layer polymeric film including one or more structural layers of homogenous polypropylene, one or more structural layers of random copolymer polypropylene, one or more anhydride modified polyethylene based tie layers, and one or more linear low density polyethylene (LLDPE) blend sealant layers having a primary LLDPE component, a secondary LLDPE component and an optional LDPE additive component.

Description

Membrane complex for controlled peelable seals film
Technical field
Aspect of the present invention relates to polymer film, relate more particularly to a kind of multi-layer polymer film, the structure sheaf of its structure sheaf that comprises one or more HOPPs, one or more atactic copolymerized polypropenes and one or more anhydride modified based on poly articulamentum, and one or more LLDPE (LLDPE) blend sealant with primary LLDPE component, optional less important LLDPE component and optional LDPE additive component.
Background technology
In industry at present, many polymer films used still can not cycling and reutilization.Due to the environmental consciousness improving with reduce the expectation of ambient influnence, still need under thin thickness, have can be customized physics and sealing property, the recycling polypropylene, polyethylene film capable of circulation of good mouldability, toughness and impact strength for example.In addition, although obtained progress at polyethylene peelable seals technical elements, yet owing to can not optimizing sealing property, can occur and the poor sealing performance of direct sealed paper and narrow sealing process window.For example, excessively strong peel strength causes fiber tearing, and weak peel strength can be damaged sterile product excessively.
The European patent EP 1736309A1 that title is " Packaging Obtained by Direct Contact Seal (packing obtaining by direct contact sealing) " discloses a kind of direct contact and has sealed, the multilayer film that it comprises coextrusion, described film comprise Tm<135 ℃ and comprise as many as 30% PB Polybutene-1 for the polyolefin-based sealant of peel seal application and Tm>135 ℃ second based on polyacrylic supporting layer.Yet specific T m and modulus that the film of EP1736309 need to add between PB Polybutene-1 and/or sealant and supporting layer are poor.
The European patent EP 1453671B1 that title is " Peelable Seal Film (peelable seals film) " discloses a kind of heat-sealable coextruded multilayer film, and it can be peeled off with multiple base material.Thermoplastic elastomer SBS's copolymer of the styrene homopolymers of the Alathon that described sealant comprises 50-80 % by weight and/or copolymer, 15-25 % by weight and/or copolymer and 5-20 % by weight, the LLDPE that wherein preferably adds the even branching of 10-20 % by weight peels off-seals to control.Yet European patent EP 1453671B need to add SBS or styrene homopolymers and/or copolymer.
The International Patent Publication WO03/04343816A1 that title is " Peelable Seal Film (peelable seals film) " discloses a kind of heat-sealable coextruded multilayer film, and it can be peeled off with multiple base material.The Alathon that described sealant comprises 50-80 % by weight and/or copolymer, the styrene homopolymers of 15-25 % by weight and/or copolymer and 5-20 % by weight thermoplastic elastomer SBS copolymer, wherein preferably add LLDPE and/or PB Polybutene-1 and peel off-seal to control.Be similar to European patent EP 1453671B1, International Patent Publication WO03/04343816 need to add SBS or styrene homopolymers and/or copolymer.
Title is the United States Patent (USP) the 5th of " Medium Modulus Polyethylene Film and Fabrication Method (medium modulus polyethylene film and production method) ", 681, No. 523A a kind of film is disclosed, it comprises high molecular weight linear PE (0.92-0.96g/cc, MI0.1-3) and linear ethylene/alpha olefin copolymer (0.85-0.92g/cc, MI0.3-3), total body density is 0.923-0.95g/cc.Other background example providing comprises: LLDPE, the b a) with LDPE) there is rubber or other elastomeric HDPE, c) there is LLDPE, the d of low MW HDPE) there is the LLDPE of high MFR HDPE, and there is the LLDPE of isotachyte.Notice in the article of this patent, the raising of thickness can not improve the physical property of described film pro rata.The disclosed film total body density of US005681523A scope prevents effective Low Temperature Thermal sealing and hot sticky performance.US005681523A does not mention the wherein sealing property of disclosed film.
Title is the United States Patent (USP) the 6th that the United States Patent (USP) of " Layered Film and Packaging Product Thereof (laminar films and packaging product thereof) " discloses No. 2003/0143416A1 and title is " Layered Film and Packaging Product Thereof (laminar films and packaging product thereof) ", 794, No. 029B2 the laminar films that comprises at least two resin beds is disclosed: the LLDPE that composite bed A) prepared by the use single site catalysts of 60-90 quality % and the PB Polybutene-1 of 40-10% quality %, and layer B) HDPE (0.950-0.970).United States Patent (USP) discloses No. 2003/0143416A1 and United States Patent (USP) the 6th, and 794, No. 029B2 needs add PB Polybutene-1 in sealant.
Title is " Dual Reactor Polyethylene Resins for Medical Packaging-Films, Bags and Pouches is (for medical package-film, the double-reactor polyvinyl resin of bag and bag) " No. WO2006/108266A1st, International Patent Publication and title are " Dual Reactor Polyethylene Resins for Medical Packaging-Films, Bags and Pouches is (for medical package-film, the double-reactor polyvinyl resin of bag and bag) " United States Patent (USP) discloses and disclose the double-reactor solution phase polymerization of connecting for No. 2006/0235146A1 under the existence of phosphinimine catalyst and the co-catalyst system that comprises aluminum-based co-catalyst.
The United States Patent (USP) the 6th that title is " Polymeric Films and Packages Produced Therefrom (polymer film and the packing being made by it) ", 632, the EP1167437A1 that No. 521B2 and title are " Polymeric Films and Packages Produced Therefrom (polymer film and the packing being made by it) " discloses polymer film, it has the skin that at least one blend by LDPE (0.915-0.930g/cc, MFI2.0-40.0g/10 minute) and polyoxyethylene alkylphenyl ethene forms.
The United States Patent (USP) that title is " Polymeric Films and Packages Produced Therefrom (polymer film and by the packing of its production) " disclose No. 2002/0160135A1 and title is that the International Patent Publication WO01/66639A1 of " Polymeric Films and Packages Produced Therefrom (polymer film and by the packing of its production) " discloses the heat sealable film that comprises sealant, is mixed with the cyclic olefin/ethylene copolymer of at least one polyethylene and Tg>30 ℃ in described sealant.
Therefore, due to the environmental consciousness improving with reduce the expectation of ambient influnence, industrial still need to manufacture a kind of have can be customized physics and the recycling general purpose polypropylene/polyethylene film capable of circulation of sealing property.Wish to produce and to have with tradition based on the suitable sealing property of poly hermetically-sealed construction and to there is improved performance as the optical property (high grade of transparency/low haze) improving, the mouldability of improving, and the mechanical performance of improving, comprise the polypropylene screen of high tenacity and impact strength.
Invention summary
One or more embodiment of the present invention manufactured have can be customized physics and the recycling capable of circulation of sealing property, general, flexible, thermoformable film, described film comprises polypropylene, polyethylene.
In one aspect of the invention, a kind of multi-layer polymer film is provided, described film comprises the structure sheaf that one or more melt flow rate (MFR)s are the HOPP of 0.5-10MFR, one or more melt flow rate (MFR)s are the structure sheaf of the atactic copolymerized polypropene of 0.5-10MFR, one or more melt index (MI)s are the anhydride modified based on poly articulamentum of 0.7-3.5, one or more LLDPE (LLDPE) blend sealants with primary LLDPE component; Wherein said multi-layer polymer film has according to ASTM D882 and is measured as the elongation at break that is greater than 400%, according to ASTM D3420, be measured as the Spencer impact strength that is greater than 800mJ, be greater than the puncture intensity of 7 pounds, less than or equal to the sealing initiation temperature of 120 ℃, according to ASTM F88-07a, be measured as the sealing intensity of 100gf/in-2000gf/in and be greater than the sealed window of 30 ℃.Described one or more LLDPE blend sealant also can comprise less important LLDPE component and/or LDPE additive component.
Described primary LLDPE component can have low long chain branching and inhomogeneous molecular weight and short-chain branched (comonomer) distributes.Described less important LLDPE component can have low long chain branching and uniform molecular weight and short-chain branched comonomer distribution.The structure sheaf of described one or more HOPPs can comprise the random copolymer of as many as 50% or based on polypropylene or poly plastic body/elastomer.
In another aspect of this invention, provide a kind of multi-layer polymer film, it comprises the high density polyethylene (HDPE) that one or more melt index (MI)s are 0.7-3.5 (HDPE) layer; One or more melt index (MI)s are the anhydride modified based on poly articulamentum of 0.7-3.5; One or more melt flow rate (MFR)s are the structure sheaf of the HOPP of 0.5-10MFR; One or more melt flow rate (MFR)s are the structure sheaf of the atactic copolymerized polypropene of 0.5-10MFR; LLDPE (LLDPE) the blend sealant with primary LLDPE component; Wherein said multi-layer polymer film has the elongation at break that is greater than 400%, and the Spencer that is greater than 800mJ impacts, and is greater than the puncture intensity of 7 pounds, less than or equal to the sealing initiation temperature of 120 ℃; According to ASTM F88-07a, be measured as the sealing intensity of 100gf/in-2000gf/in; With the sealed window that is greater than 30 ℃.Wherein elongation at break is measured according to ASTM D882, and puncture is measured according to ASTM D7192, and Spencer impacts and measures according to ASTM D3420; And final sealing intensity is measured according to ASTM F88-07a.Described one or more LLDPE blend sealant also can comprise less important LLDPE component and/or LDPE additive component.
In one or more embodiments, described one or more HDPE layer can account for the 0-30 % by weight of described film, and the structure sheaf of described HOPP can account for the 10-60 % by weight of described film, the gross weight meter based on described film, and be not optionally directly exposed in external environment condition.
In one or more embodiments, the structure sheaf of described one or more HOPPs can be the isotaxy homopolymerization PP resin based on metallocene catalysis.
In one or more embodiments, the structure sheaf of described one or more atactic copolymerized polypropenes can account for the 20-70 % by weight of described film, and described one or more sealant can account for the 10-35 % by weight of described film, the gross weight meter based on described film.The structure sheaf of described one or more atactic copolymerized polypropenes can have the alpha-olefin comonomer of 1-5%, with the comonomer of ethene.
In one or more embodiments, the less important LLDPE component of described blend sealant can be the resin of metallocene or rear metallocene catalysis, and its amount is the 0-40 % by weight of described sealant blend, the gross weight meter based on described sealant blend.In another embodiment, the less important LLDPE component of described blend sealant can be the second non-homogeneous catalysis LLDPE.The less important LLDPE component of described blend sealant can have 0.850-0.930g/cm 3density and the melt index (MI) of 0.7-3.5MI.
The resin that the primary LLDPE component of described blend sealant is Ziegler-Natta catalysis, its amount is the 60-100 % by weight of described sealant blend, the gross weight meter based on sealing layer blend.The primary LLDPE component of described blend layer can have 0.850-0.930g/cm 3density and the melt index (MI) of 0.7-3.5MI.
In one or more embodiments, the additive of described blend sealant can be low density polyethylene (LDPE) (LDPE), and its amount accounts for the 0-40 % by weight of described sealant blend, the gross weight meter based on described sealant blend.The additive LDPE component of described blend sealant can have 0.910-0.935g/cm 3density.
In one or more embodiments, one or more HDPE layers can have 0.94-0.97g/cm 3density.
The peel strength of described film can be 100gf/in-2000gf/in.Described multi-layer polymer film is thermoformable and recycling capable of circulation.
Another aspect of the present invention relates to the various application of polymer film as herein described, includes but not limited to pack and flow the application in packing (flow wrap) in blister package, vertical or horizontal filling.
Accompanying drawing summary
Fig. 1 has shown the embodiment of multi-layer polymer film of the present invention, it has high density polyethylene (HDPE) (HDPE) layer, anhydride modified based on poly articulamentum, the first structure sheaf of HOPP, the second structure sheaf of atactic copolymerized polypropene, second is anhydride modified based on poly articulamentum and LLDPE (LLDPE) sealant; With
Fig. 2 has shown the embodiment of multi-layer polymer film of the present invention, it has the first structure sheaf of HOPP, the second structure sheaf of atactic copolymerized polypropene, anhydride modified based on poly articulamentum and LLDPE (LLDPE) sealant.
Detailed Description Of The Invention
Before describing some exemplary of the present invention, should understand the structure described in the invention is not restricted to below to describe or the details of processing step.The present invention can implement and can put into practice in every way or implement with other embodiment.
The present invention relates to a kind of multi-layer polymer film, it only comprises provides performance and olefin-based polymer cheaply.Owing to using one or more polypropylene layers, anhydride modified based on poly articulamentum and polyethylene (PE) sealant, multi-layer polymer film of the present invention provides recycling capable of circulation and durable film.One or more embodiment of the present invention relates to the various application of polymer film as herein described, includes but not limited to that vertical or horizontal filling packs, pocket type film, stream packing; And for example, for top net and the spacer screen polymer film of the flexible blister package master package of medicine equipment (for).One or more embodiment of the present invention provides a kind of to be had and can form (comprising Choice of Resin and mixing ratio) and customized physics and the polymers for general use film of sealing property by changing thickness, supporting layer % and sealant.Described PE base sealant compound can comprise LLDPE (LLDPE) the resin blend of (comprising elastomer or plastic body based on ethene).The sealing property of described film can be customized by regulating the ratio of described two kinds of LLDPE components and the selection based on PE resin (comprising molecular weight (MW), MW distribution, comonomer (or short-chain branched) type, co-monomer content, comonomer distribution and long chain branching content).The sealing property of described film can be further customized by sneaking into high density polyethylene (HDPE) (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE) (LDPE) or other alpha olefin copolymer.
The paper, non woven cloth in polymer that embodiment of the present invention are sealant coating as Tyvek and be coated with sealant those, the paper of top net polymer-based film and uncoated or direct sealing provides the sealing property as suitable in ethane-acetic acid ethyenyl ester (EVA) with copolymer in ionomer (Surlyn) with packaging resin, allows the optimization of wide process window, peel strength, recycling cost-saving and capable of circulation simultaneously.
Below will the component of polymer film of the present invention be described in more detail.
high density polyethylene (HDPE) (HDPE) layer
One or more layers of multi-layer polymer film 10 can comprise high density polyethylene (HDPE) (HDPE) layer 20, and wherein each high density polyethylene (HDPE) (HDPE) layer can be 0-30 % by weight, the gross weight meter based on described film.Described HDPE layer is characterised in that to have 0.94-0.97g/cm 3density.Described layer can optionally comprise LLDPE, and preferably melt index (MI) MI is 0.7-3.5, the resin of the metallocene that most preferably MI is 1-2 or rear metallocene catalysis, and its density range is 0.850-0.930g/cm 3.Also can use the LLDPE of the Z.N. catalysis with identical MI and density range.Can optionally add 0-40%, preferably the blend of the LDPE of 0-20%.Wherein said LDPE has the melt index (MI) of 0.7-3.5MI, most preferably has the MI of 1-2, and 0.910-0.93g/cm 3density.
articulamentum
In described multi-layer polymer film, can have one or more articulamentums that comprise anhydride modified LLDPE 30, wherein each articulamentum can account for the 0-15 % by weight of described film, the gross weight meter based on described film.Articulamentum 30 is characterised in that to have 0.908-0.935g/cm 3density.In a specific embodiments of the present invention, articulamentum 30 is characterised in that the melt index (MI) with 1-2MI.In addition, can in articulamentum or sealant structure, sneak into extra LLDPE and/or low density PE (LDPE) to reduce costs.
the structure sheaf of HOPP
One or more structure sheafs of multi-layer polymer film 10 can comprise HOPP resin 40, and wherein the layer of each HOPP resin can account for the 10-60 % by weight of described film, the gross weight meter based on described film.Can utilize the melt flow rate (MFR) of 0.5-10MFR to obtain required physical property.Can use Metallocenyl isotaxy PP to improve optics and mechanical performance, and if superficial layer reduce coefficient of friction (CoF).
random ethylene-PP copolymer structure layer
One or more structure sheafs of multi-layer polymer film 10 can comprise random ethylene-polypropylene (PP) copolymer 50, wherein each random ethylene-PP copolymer layer can account for the 20-70 % by weight of described film, the gross weight meter of the film based on comprising random ethylene-PP copolymer.The structure sheaf 50 of described random ethylene-PP copolymer is characterised in that the alpha-olefin comonomer with 1-5%, with the comonomer of ethene.Can utilize the melt flow rate (MFR) of 0.5-10MFR to obtain required physical property.
lLDPE (LLDPE) sealant
Multi-layer polymer film 10 can comprise one or more LLDPEs (LLDPE) sealant 60, and wherein each LLDPE sealant accounts for the 10-35 % by weight of described film, the gross weight meter based on described film.Described one or more sealant 60 is characterised in that to have 0.880-0.930g/cm 3total body density.The feature of described one or more sealant 60 is further to have the melt index (MI) of 0.7-3.5MI.In a specific embodiments of the present invention, described one or more sealants have the melt index (MI) of 1-2MI.
The primary LLDPE component of described one or more sealants has low long chain branching and inhomogeneous molecular weight and short-chain branched (comonomer) distributes.The resin that the primary LLDPE component of described blend sealant is Ziegler-Natta catalysis, its amount is the 60-100 % by weight of described sealant blend, the gross weight meter based on sealing layer blend.In one or more embodiments of the present invention, the amount of the resin of described Ziegler-Natta catalysis is the 70-80 % by weight of described sealant blend, the gross weight meter based on sealing layer blend.The primary LLDPE component of described blend sealant is characterised in that to have 0.850-0.930g/cm 3density.In one or more embodiments, the primary LLDPE component of described blend sealant has the melt index (MI) of 0.7-3.5MI.In one or more embodiments, the feature of the primary LLDPE component of described blend sealant is further to have the melt index (MI) of 1-2MI.The primary LLDPE component of described sealant also can comprise linear ethylene copolymer, elastomer or the plastic body of inhomogeneous branching.
Described optional less important LLDPE component has low long chain branching and uniform molecular weight and short-chain branched comonomer distribution.The less important LLDPE component of described blend sealant is the resin of metallocene or rear metallocene catalysis, and its amount is the 0-40 % by weight of described sealant blend, the gross weight meter based on described sealant blend.In one or more embodiments of the present invention, the less important LLDPE component of described blend sealant has the melt index (MI) of 0.7-3.5MI.In a specific embodiments of the present invention, the less important LLDPE component of described blend sealant has the melt index (MI) of 1-2MI.
The optional less important LLDPE component of described blend sealant is characterised in that to have 0.850-0.930g/cm 3density.The less important LLDPE component of described sealant also can comprise linear ethylene copolymer, elastomer or the plastic body of even branching.
the additive of blend sealant
The additive of described blend sealant is the low density polyethylene (LDPE) (LDPE) that accounts for the 0-40 % by weight amount of described sealant blend, the gross weight meter based on sealing layer blend.In a specific embodiments of the present invention, the amount of described additive accounts for the 20-30 % by weight of sealing layer blend, the gross weight meter based on sealing layer blend.The additive component of described blend sealant is characterised in that to have 0.910-0.935g/cm 3density.The additive component of described blend sealant is characterised in that the melt index (MI) with 0.7-3.5MI.In a specific embodiments of the present invention, the additive component of described blend sealant has the melt index (MI) of 1-2MI.Peel strength is 100gf/in-2000gf/in.Therefore density PE (MDPE) or high density PE (HDPE) in can using.Also can use the LLDPE having than the Z.N. catalysis of the low MI of primary sealing resin and density.
Additive comprises but is not limited to antistatic additive, antioxidant (for example, if Hinered phenols (four (methylene-3-(3,5-di-tert-butyl-hydroxy phenyl) propionic ester) methane) is as the Irganox from BASF tM1010 or from the Songnox1010 of Songwon tM), or for example octadecyl-3-(3,5-di-tert-butyl-hydroxy phenyl) propionic ester as the Irganox from BASF tM1076), UV stabilizing agent (Ν for example, Ν-distearyl azanol, as the IrgastabFS042 from BASF, or hindered amine as light stabilizer (HALS) is as two (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, as from Mayzo, the BLS929 of Inc. and from the triphenyl phosphate of Bayer), stable radiation agent, slip agent, anti-caking agent, fining agent, nucleator, anti-yellowing change agent, processing aid, colouring agent, filler, the firm agent of increasing or flexibilizer, pigment, blowing agent, plasticizer is as diisononyl phthalate (DINP), crosslinking agent and cohere additive.
Other example that can be used for the additive arbitrarily or in whole layer in described membrane structure includes but not limited to three (3,5-di-tert-butyl-4-hydroxyl benzyl) isocyanuric acid ester, 1,3,5-trimethyl-2,4,6-tri-(3,5-di-tert-butyl-4-hydroxyl benzyl) benzene, three (butyl toluene base) butane, N, N'-hexa-methylene two (3,5-di-t-butyl-4-hydroxyl hydrocinnamamide), 4-ethyl-2,6-DI-tert-butylphenol compounds, Ν, Ν-distearyl azanol, three (2,4-di-tert-butyl-phenyl) phosphite ester, two (2,4-di-tert-butyl-phenyl) pentaerythritol diphosphites, distearyl pentaerythrityl diphosphite, triphenyl phosphate, poly-[6-[1,1,3,3-tetramethyl butyl) amino]-s-triazine-2,4-bis-bases] [2,2,6,6-tetramethyl-4-piperidyl) imino group] hexa-methylene [2,2,6,6-tetramethyl-4-piperidyl] imido alcohol], dimethyl succinate and 4-hydroxyl-2, the polymer of 2,6,6-tetramethyl-1-piperidines ethanol, two (2,2,6,6-tetramethyl-4-piperidyl) sebacate, cetyl-3,5-di-tert-butyl-4-hydroxybenzoic acid ester, UV-531, 2-(2'-hydroxyl-5'-aminomethyl phenyl) BTA and 2-[2'-hydroxyl-3', 5'-bis-(1,1-dimethyl benzyl) phenyl]-2H-BTA.
The physics of film of the present invention and processing characteristics can be by changing structure sheaf ratio in whole compound or by changing ratio, the PP Choice of Resin (comprising reactor, catalyst and visbreaking technology, melt flow rate (MFR) (MFR) and/or ethylene comonomer content) of HOPP layer and random polypropylene layer and using additive as nucleator, or pass through the integral thickness of the described film of change and customized.The sealing property of described film can be customized by sneaking into extra LLDPE component and selection PE resin (comprising MW, MW distribution, comonomer type, comonomer (or short-chain branched) content, comonomer distribution and long chain branching content).The sealing property of described film can be further by sneaking into HDPE, LDPE or other alpha olefin copolymer as elastomer or plastic body and customized.Described LLDPE has low long chain branching and inhomogeneous molecular weight distribution (MWD) and short-chain branched (comonomer) distributes (SCBD), and this can realize by Ziegler-Natta catalyst.The amount of inhomogeneous LLDPE in sealant and the molecular property of selected resin will determine sealing property, comprise: heat seal and hot sticky initial temperature, hot sticky and heat seal window width and final hot sticky and heat-seal strength.Described optional less important LLDPE component has respectively low long chain branching and even molecular weight and short-chain branched (comonomer) distribution MWD and SCBD.This can, by metallocene catalyst, preferably realize by rear metallocene catalyst.The sealing property of described film can be customized by sneaking into extra LLDPE component.The sealing property of described film can be further by sneaking into HDPE, LDPE or other alpha olefin copolymer as elastomer or plastic body and customized.In specific embodiments, preferred whole melt index (MI) (MI) is that 1-3MI and total body density are 0.910-0.918g/cc.
Due to its low-level long chain branching and narrow MW and short-chain branched (SCB) distribution, described optional even LLDPE component provides higher final hot sticky and sealing intensity.The wide MW of inhomogeneous LLDPE component and SCB are distributed in measurable heat seal and hot sticky intensity are provided at lower temperature, and have widened hot sticky and heat seal window.
Have than optional the second inhomogeneous LLDPE component of the low MI of the LLDPE of basic Z.N. catalysis and MW measurable heat seal and hot sticky intensity are provided at further lower temperature, and further widened hot sticky and heat seal window.This also can realize by adding LDPE.Described LDPE is used as low-cost additive, and the foaming stability improving during blown film production technology is provided.
Therefore, can by regulating the % by weight of LLDPE or LDPE component, the sealing intensity of customized film cause fiber tearing or other less desirable packing failure mode to guarantee suitable peelable seals.If required, can realize welded seal by the even LLDPE component of higher level.
Due to its high fusing point of comparing with LLDPE, HDPE can be used as superficial layer and is not clamminess during packing moulding process to guarantee described film.The PP of embedding can provide the stability of the raising of environment film being exposed at packaging product life period.In order further to improve performance, comprise and reduce mist degree and physics toughness, can use the LLDPE of metallocene or rear metallocene catalysis to replace HDPE.For lower cost and foaming stability also can be used Z.N.LLDPE, replace HDPE, thereby have the possibility of the extra LDPE of 0-40%.
Subsequently, the physics of described film and processability can be customized by selecting polypropylene or its blend.HOPP can provide high obstructing performance, and high rigidity and toughness are provided simultaneously, and if use nucleator or fining agent that the high grade of transparency is also provided, and provide chemical resistance and temperature tolerance.Polypropylene is cheap, be easy to processing and recycling capable of circulation.Add the optical property that atactic copolymerized polypropene provides the toughness improving, impact resistance, flexibility and improved.Impact-resistant copolymerized polyacrylic interpolation provides best impact/rigid balancing.In order to keep recycling capable of circulation, film of the present invention is not containing any siloxanes, vinyl acetate, styrene, ring-alkylated styrenes, vinyl alcohol, chloride, phthalate, esters of acrylic acid, acrylic compounds, ethanol acids, methacrylic, vinyl acetate class, carbamates, acrylic compounds or acid anhydride class.
For the HOPP of polymer film structure of the present invention, random PP, anhydride modified LLDPE and Z.N and m-LLDPE resin, it is all commerical grade olefin resin, with respect to packaging resin, ionomer (Surlyn) and the copolymer of superior performance, as ethane-acetic acid ethyenyl ester (EVA), they provide cost advantage.Reduce thickness and commodity in use resin provide further green advantage and cost lower.
The LLDPE resin that sealant is proposed is commerical grade PE resin, and it,, for the EVA or ionomer resin of current highest ranking, provides cost advantage, and suitable sealing property is provided simultaneously.The wide hot sticky and heat seal window being provided by LLDPE sealant of the present invention causes more stable production window.In addition, comprise polypropylene structure sheaf, the anhydride modified film based on poly articulamentum and polyethylene sealant provides recycling capable of circulation.
Fig. 1 has shown the embodiment of multi-layer polymer film 10 of the present invention, it comprises optional high density polyethylene (HDPE) (HDPE) layer 20, anhydride modified based on poly articulamentum 30, directly be not exposed to the first structure sheaf 40 of the HOPP in external environment condition, the second structure sheaf 50 of atactic copolymerized polypropene, anhydride modified based on poly the second articulamentum 30, and there is LLDPE (LLDPE) the blend sealant 60 of primary LLDPE component, optional less important LLDPE component and optional low density polyethylene (LDPE) (LDPE) additive component.With regard to Fig. 1, described high density polyethylene (HDPE) (HDPE) layer accounts for the 0-30 % by weight of described film, preferably accounts for the 10-20 % by weight of described film, the gross weight meter based on described film, and there is the melt index (MI) of 0.7-3.5.Anhydride modified poly the first and second articulamentums account for the 0-15 % by weight of described film separately, preferably account for 10 % by weight of described film, the gross weight meter based on described film, and can there is the vector resin that melt index (MI) is 0.7-3.5.The first structure sheaf of described HOPP accounts for the 10-50 % by weight of described film, preferably accounts for the 10-30 % by weight of described film, the gross weight meter based on described film, and there is the melt flow rate (MFR) of 0.5-10MFR.The second structure sheaf of described atactic copolymerized polypropene accounts for the 20-70 % by weight of described film, preferably accounts for the 30-40 % by weight of described film, the gross weight meter based on described film, and there is the melt flow rate (MFR) of 0.5-10MFR.LLDPE (LLDPE) blend sealant 60 accounts for the 10-35 % by weight of described film, preferably account for the 10-20 % by weight of described film, gross weight meter based on described film, and there is primary LLDPE component, optional less important LLDPE component and optional LDPE component.Multi-layer polymer film shown in Fig. 1 has according to ASTM D882 and is measured as the elongation at break that is greater than 400%, and the Spencer that is greater than 800mJ impacts, and is greater than the puncture intensity of 7 pounds; Less than or equal to the sealing initiation temperature of 120 ℃, according to ASTM F88-07a, be measured as the sealing intensity of 100gf/in-2000gf/in; With the sealed window that is greater than 30 ℃, wherein elongation at break is measured according to ASTM D882; Puncture is measured according to ASTM D7192; Spencer impacts and measures according to ASTM D3420; And final sealing intensity is measured according to ASTM F88-07a.Described film is thickness recycling capable of circulation and that have 1-80 mil.
Fig. 2 has shown another embodiment of multi-layer polymer film 10 of the present invention, the first structure sheaf 40 that it comprises HOPP; The second structure sheaf 50 of atactic copolymerized polypropene; One or more anhydride modified based on poly articulamentum 30, and there is LLDPE (LLDPE) sealant 60 of primary LLDPE component, optional less important LLDPE component and optional LDPE additive component.With regard to Fig. 2, the first structure sheaf 40 of HOPP accounts for the 20-60 % by weight of described film, preferably accounts for the 20-40% of described film, the gross weight meter based on described film, and there is the melt flow rate (MFR) of 0.5-10MFR.The second structure sheaf 50 of atactic copolymerized polypropene accounts for the 30-70 % by weight of described film, preferably accounts for the 30-50 % by weight of described film, the gross weight meter based on described film, and there is the melt flow rate (MFR) of 0.5-10MFR.Described one or more anhydride modified 5-15 % by weight that accounts for described film based on poly articulamentum 30, preferably accounts for 10 % by weight of described film, the gross weight meter based on described film, and there is the melt index (MI) of 0.7-3.5.LLDPE (LLDPE) blend sealant 60 accounts for the 10-35 % by weight of described film, preferably account for the 15-20 % by weight of described film, gross weight meter based on described film, and there is primary LLDPE component, optional less important LLDPE component and optional LDPE component.Multi-layer polymer film shown in Fig. 2 has according to ASTM D882 and is measured as the elongation at break that is greater than 400%, and the Spencer that is greater than 800mJ impacts; Be greater than the puncture intensity of 7 pounds; Sealing initiation temperature less than or equal to 120 ℃; According to ASTM F88-07a, be measured as the sealing intensity of 100gf/in-2000gf/in; With the sealed window that is greater than 30 ℃, wherein elongation at break is measured according to ASTM D882; Puncture is measured according to ASTM D7192; Spencer impacts and measures according to ASTM D3420; And final sealing intensity is measured according to ASTM F88-07a.
In one or more embodiments, hot sticky window is greater than 20 ℃.In one or more embodiments, the final hot sticky intensity of described polymer film is greater than 50gf/in.
In one or more embodiments of the present invention, the application of polymer film as herein described includes but not limited to pack in blister package, vertical or horizontal filling, the application in pocket type film and stream packing.
In one or more embodiments of the present invention, described multi-layer polymer film has according to ASTM D882 and is measured as the elongation at break that is greater than 400%.
In one or more embodiments of the present invention, described multi-layer polymer film has and according to ASTM D3420, is measured as the Spencer that is greater than 800mJ and impacts.
In one or more embodiments of the present invention, described multi-layer polymer film has according to ASTM D7192 and is measured as the puncture that is greater than 7 pounds.
In one or more embodiments of the present invention, described multi-layer polymer film has the sealing initiation temperature less than or equal to 120 ℃.
In one or more embodiments of the present invention, described multi-layer polymer film has the sealing intensity that is measured as 100gf/in-2000gf/in according to ASTM F88-07a.
In one or more embodiments of the present invention, described multi-layer polymer film has the sealed window that is greater than 30 ℃.
Thermoformable and the cycling and reutilization completely of film of the present invention.
produce
Multi-layer film structure of the present invention can be used known conventional blowing, curtain coating, extrude or the production of laminated film technology.Previously described LLDPE seal blends, all other blends and potential all other additive melt blendable, compound or be dry mixed, this depends on extrudes with by the extruder of the film production line of described two kinds of component blend, and it has saved the extra cost of less important composite steps.
The film properties of giving in claims is the blown film that 5 mils and blow-up ratio are 1.5:1 based on thickness.
the description of method of testing
The mist degree of transparent plastic and transmittance are measured according to ASTM D-1003-07 and with percent haze record, are rounded to 0.1%.As ASTM D-1003-07 defines, mist degree is the scattering of light causing due to sample, and it is to cause at object reverse side, through object, to observe the reason of reduction.
Impact resistance is defined as the measurement index that causes plastic foil energy of losing efficacy under the free dart impact condition of regulation, and measures according to ASTM D1709-08.Impact resistance is recorded as impact failure weight, is rounded to 1g.
Heat-seal strength (hot sticky) is defined as after being close to formation sealing and before being cooled to environment temperature, the thermosealed intensity measurement index forming between the thermoplastic surface of flexible net.Heat-seal strength (hot sticky) is measured the gf/in of Qie Yi unit record according to ASTM F-1921.
Sealing intensity (also referred to as peel strength) is defined as flexible material and hard material or another flexible material power of separated required per unit sealed width progressively, and it measures the gf/in of Qie Yi unit record according to ASTMF88-07a.The sealing intensity of film of the present invention is that the minimum of a value of 100g/in is to the maximum of 2000g/in.Sealing intensity is measured use standard strip seal (now with himself heat seal) and is carried out, top sealing strip under 280 °F, 1.0s Dwell, 50psi.The bottom strip of heating is under 100 °F, and Gasket type (silicon rubber, 60 Shore A, 1/8 " thick, medium (diamond, 0.012 " resolution ratio), is peeling off first 24 hours preparation seal sample of test.
Density is according to ASTM D-792 measurement and with gram/cc (g/cc) record.
Melt index (MI) is measured and is carried out according to ASTM D-1238.The molecular weight of melt index (MI) and polymer is inversely proportional to.Therefore, molecular weight is higher, and melt index (MI) is lower, however this relation nonlinear.Melt index (MI) was with g/10 minute record.Melt index (MI) is measured also available even more senior weight and is carried out, for example, according to ASTM D-1238, carry out.ASTM D-1238 is also for measuring the melt flow rate (MFR) (MFR) of thermoplastic.Measurement unit is grams/10 minute (g/10 minute) of material.Its based within preset time from the measurement of the quality of materials of die extrusion.
Spencer impact strength measures to measure the resistance of film impact-penetrate according to ASTM D3420.Average impact strength is measured with joule or centimetre kilogram.
Puncture at a slow speed and measure to measure the resistance of described film to puncture according to ASTM D7192.Average puncture intensity is measured with ft lbf.
The tensile property of described film is measured according to ASTM D882.Elongation at break is the measurement index of the flexible amount of described film before fracture.Elongation at break is with the % measure of the change with respect to initial specification length.
Heat seal initial temperature is defined as the minimum temperature while obtaining 50gf/in sealing intensity.
Hot sticky initial temperature is defined as and develops the required minimum seal temperature of 20gf/in sealing intensity.
" embodiment " that this description refers in the whole text, " some embodiment ", " one or more embodiment " or " embodiment " mean the specific features relevant with this embodiment, structure, material or characteristic and are included at least one embodiment of the present invention.Therefore, the wording such as " in one or more embodiments ", " in certain embodiments ", " in one embodiment " or " in embodiments " not must refer to same embodiment of the present invention in the appearance everywhere of this description.In addition, specific features, structure, material or characteristic can be combined in one or more embodiments in any suitable manner.
Although described the present invention with reference to specific embodiments herein, it should be understood that these embodiments are only signal principle of the present invention and application.It will be apparent for a person skilled in the art that and can make various variations and change and not depart from the spirit and scope of the invention method and apparatus of the present invention.Therefore, the present invention is intended to contain variation and the change within the scope of claims and equivalent thereof.

Claims (24)

1. multi-layer polymer film, described film comprises:
One or more melt flow rate (MFR)s are the structure sheaf of the HOPP of 0.5-10MFR,
One or more melt flow rate (MFR)s are the structure sheaf of the atactic copolymerized polypropene of 0.5-10MFR,
One or more melt index (MI)s are the anhydride modified based on poly resin articulamentum of 0.7-3.5,
One or more LLDPE (LLDPE) blend sealants with primary LLDPE component;
Wherein said multi-layer polymer film has according to ASTM D882 and is measured as the elongation at break that is greater than 400%; According to ASTM D7192, be measured as the puncture intensity that is greater than 7 pounds; According to ASTM D3420, be measured as the Spencer impact strength that is greater than 800mJ; Sealing initiation temperature less than or equal to 120 ℃; According to ASTM F88-07a, be measured as the sealing intensity of 100gf/in-2000gf/in and be greater than the sealed window of 30 ℃.
2. according to the multiple layer polymer membrane complex of claim 1, wherein one or more LLDPE blend sealants also comprise less important LLDPE component.
3. according to the multiple layer polymer membrane complex of claim 1, wherein one or more LLDPE blend sealants also comprise LDPE additive component.
4. according to the multiple layer polymer membrane complex of claim 1, wherein said primary LLDPE component has low long chain branching, inhomogeneous molecular weight and short-chain branched (comonomer) distributes.
5. according to the multiple layer polymer membrane complex of claim 2, wherein said less important LLDPE component has low long chain branching and uniform molecular weight and short-chain branched comonomer distribution.
6. according to the multiple layer polymer membrane complex of claim 1, the structure sheaf of wherein one or more HOPPs can comprise the random copolymer of as many as 50% or based on polypropylene or poly plastic body/elastomer.
7. multi-layer polymer film, it comprises:
One or more melt index (MI)s are high density polyethylene (HDPE) (HDPE) layer of 0.7-3.5,
One or more melt index (MI)s are the anhydride modified based on poly articulamentum of 0.7-3.5,
One or more melt flow rate (MFR)s are the structure sheaf of the HOPP of 0.5-10MFR, and it is not directly exposed in external environment condition,
One or more melt flow rate (MFR)s are the structure sheaf of the atactic copolymerized polypropene of 0.5-10MFR,
One or more LLDPE (LLDPE) blend sealants with primary LLDPE component;
Wherein said multi-layer polymer film has according to ASTM D882 and is measured as the elongation at break that is greater than 400%; According to ASTM D7192, be measured as the puncture intensity that is greater than 7 pounds; According to ASTM D3420, be measured as the Spencer impact strength that is greater than 800mJ; Sealing initiation temperature less than or equal to 120 ℃; According to ASTM F88-07a, be measured as the sealing intensity of 100gf/in-2000gf/in and be greater than the sealed window of 30 ℃.
8. according to the multiple layer polymer membrane complex of claim 7, wherein one or more LLDPE blend sealants also comprise less important LLDPE component.
9. according to the multiple layer polymer membrane complex of claim 7, wherein one or more LLDPE blend sealants also comprise LDPE additive component.
10. according to the multiple layer polymer membrane complex of claim 7, wherein one or more HDPE layers account for 0-30 % by weight, the gross weight meter based on described film.
11. according to the multiple layer polymer membrane complex of claim 7, and the structure sheaf of wherein said HOPP accounts for the 10-50 % by weight of described film, the gross weight meter based on described film.
12. according to the multiple layer polymer membrane complex of claim 7, and the structure sheaf of wherein one or more HOPPs is the isotaxy homopolymerization PP resin based on metallocene catalysis.
13. according to the multiple layer polymer membrane complex of claim 7, and the structure sheaf of wherein one or more atactic copolymerized polypropenes accounts for the 20-70 % by weight of described film, the gross weight meter based on described film.
14. according to the multiple layer polymer membrane complex of claim 7, and wherein one or more sealants account for the 10-35 % by weight of described film, the gross weight meter based on described film.
15. multiple layer polymer membrane complex according to Claim 8, the less important LLDPE component of wherein said blend sealant is the resin of metallocene or rear metallocene catalysis, its amount accounts for the 0-40 % by weight of described sealant blend, the gross weight based on described sealant blend.
16. according to the multiple layer polymer membrane complex of claim 7, the resin that the primary LLDPE component of wherein said blend sealant is Ziegler-Natta catalysis, its amount accounts for the 60-100 % by weight of sealant blend, the gross weight based on described sealant blend.
17. according to the multiple layer polymer membrane complex of claim 9, and the additive of wherein said blend sealant is low density polyethylene (LDPE) (LDPE), and its amount accounts for the 0-40 % by weight of sealant blend, the gross weight based on described sealant blend.
18. according to the multiple layer polymer membrane complex of claim 7, and wherein the primary LLDPE component of blend layer has 0.850-0.930g/cm 3density and the melt index (MI) of 0.7-3.5MI.
19. multiple layer polymer membrane complex according to Claim 8, the less important LLDPE component of wherein said blend sealant has 0.850-0.930g/cm 3density and the melt index (MI) of 0.7-3.5MI.
20. multiple layer polymer membrane complex according to Claim 8, the less important LLDPE component of wherein said blend sealant is the LLDPE of the second heterogeneous catalysis and has 0.850-0.930g/cm 3density and the MI scope of 0.7-3.5MI.
21. according to the multi-layer polymer film of claim 1, and wherein said multi-layer polymer film is thermoformable.
22. according to the multi-layer polymer film of claim 1, and wherein said multi-layer polymer film is recycling capable of circulation.
23. according to the multi-layer polymer film of claim 7, and wherein said multi-layer polymer film is thermoformable.
24. according to the multi-layer polymer film of claim 7, and wherein said multi-layer polymer film is recycling capable of circulation.
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US20130095335A1 (en) 2013-04-18

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